Coordination between loss of excitation protection and minimum excitation limit function of voltage regulation system

Established practice is such that the relay protection system and excitation are adjusted independently of each other, which very often leads to non-coordinated action. When network disturbance occur, it necessary provide basic functions eliminate fault if necessary, all generators respond so as preserve stability use most their capabilities. The task under prevent damage generator in a not allowed mode operation. Also important absorption large amounts reactive power from can lead voltage collapse or line failure transmission system. This paper deals with minimal limiter, part system, well coordination between them. In current proposed settings presented regarding case studies plants "EPS".